Driving attachment for eye-bolt hangers and the like

Abstract

A pair of jaws, having two sets of mutually perpendicular surfaces which are oriented 45 degrees with respect to the direction of jaw motion. During adjustment the jaws move parallel to each other to accommodate different shank diameters. The opening and closing of the jaws for receiving and clamping a shank is accomplished by an overcenter toggle assembly that produces a combination of parallel and rotational motion which secures the shank against the two mutually orthogonal surfaces of the jaw.

What is claimed is: 
     
       1. An apparatus for installing hangers comprising: a body;   a 1st jaw;   a 1st parallel linkage assembly connecting said 1st jaw to said body; a 2nd jaw;   a 2nd parallel linkage assembly connecting said 2nd jaw to said body;   means for adjusting the position of said 1st and 2nd parallel linkage assemblies so as to cause said 1st and 2nd jaws to move parallel, each to the other, when either of said parallel linkage assemblies is adjusted; a drive shaft connected to said body, said drive shaft being adapted to permit its insertion into a portable drill chuck;     toggle means for dosing said 1st and 2nd jaws so as to secure a hanger shaft in coaxial alignment with the rotational axis of said drive shaft;   and wherein said 1st and 2nd jaws each comprises a pair of mirror image mutually perpendicular surfaces, and wherein the corresponding mutually perpendicular surfaces on said 1st jaw are parallel to the corresponding mutually perpendicular surfaces on said 2nd jaw, and wherein each surface of said 1st jaw functions in cooperation with a corresponding surface of said 2nd jaw as a means for retaining a hanger shank when said 1st and 2nd jaws are adjusted to bring said mutually perpendicular surfaces into contact with a hanger shank.   
     
     
       2. An apparatus for installing hangers comprising: a body having a drive shaft adapted to engage with a rotating power source;   a pair of jaws; p1 parallel linkage means for attaching said pair of jaws to said body so as to permit either of said jaws to be moved in a direction so as to maintain its orientation invariant with respect to the axis of rotation of said drive shaft;   locking means for causing said pair of jaws to engage a hanger shaft so as to coaxially align the hanger shaft with the axis of rotation of said drive shaft;   and wherein each jaw of said pair of jaws is constructed to have at least two mutually perpendicular surfaces, and wherein the mutually perpendicular surfaces of one jaw are parallel to the corresponding mutually perpendicular surfaces of the other jaw;   and wherein is included:   adjustment means for positioning each jaw of said pair of jaws so as to bring both jaws into contact with the shank of a hanger whereby said mutually perpendicular surfaces of said jaws function to center the axis of the hanger shank in coaxial alignment with the rotational axis of said drive shaft.   
     
     
       3. An apparatus for installing hangers of the type having a lag screw shank which is bent to produce a head configuration which extends beyond the shank diameter comprising: at least one jaw means for engaging some 1st portion of a hanger shank;   2nd jaw means for engaging some 2nd portion of the hanger shank, and wherein at least one of said 1st and 2nd jaw means are adapted to accommodate the hanger head configuration when said 1st and 2nd jaw means are positioned so that each engages some portion of the hanger shank;   and further including drive shaft means positioned and oriented for rotating the hanger shank about its geometric screw axis when said 1st and 2nd jaw means are positioned to engage the hanger shank.   
     
     
       4. The apparatus recited in claim 3 wherein is included means for moving at least one jaw means comprising: parallel linkage means for attaching a selected one of said jaw means to said drive shaft means so as to position said selected jaw means parallel to the axis of rotation of said drive shaft means whereby said selected jaw means will retain its parallel orientation with respect to the axis of rotation of said drive shaft means when said selected jaw means is moved to engage some portion of the hanger shank.   
     
     
       5. The apparatus recited in claim 4 wherein is included positioning means for locating the hanger shaft coaxially with the axis of rotation of said drive shaft means when said selected jaw means is moved to engage some portion of the hanger shank. 
     
     
       6. The apparatus recited in claim 5 wherein is included: locking means for holding said 1st and 2nd jaw means in pressure contact with the hanger shaft so as to retain the hanger shaft in coaxial alignment with said drive shaft means when said drive shaft means is rotated.